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Thread: Charging System QUICK TEST

  1. #91
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    I appreciate your input. I was sure I had 12 volts on grounds, but double checked everything. Battery was hooked up correctly and 12.16volts on the grounds when the key is on. Since I discovered this issue, nothing happens when I hit start button. So I canít test stator. My r/r has a white plug with I think 4 wires and a red wire with a bullet connection. When I disconnect the white plug or the red wire of the r/r, it kills the voltage to the grounds.
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  2. #92
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    Quote Originally Posted by NOXUZ View Post
    I appreciate your input. I was sure I had 12 volts on grounds, but double checked everything. Battery was hooked up correctly and 12.16volts on the grounds when the key is on. Since I discovered this issue, nothing happens when I hit start button. So I can’t test stator. My r/r has a white plug with I think 4 wires and a red wire with a bullet connection. When I disconnect the white plug or the red wire of the r/r, it kills the voltage to the grounds.
    I would strongly suspect your R/R. Remove or disconnect it completely. Try and start the bike. See why it will not crank over when you hit the starter.
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  3. #93
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    Iíll have to investigate more tomorrow. I tried disconnecting it but it also killed the dash lights and nothing happened when I hit the starter

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    Quote Originally Posted by NOXUZ View Post
    I’ll have to investigate more tomorrow. I tried disconnecting it but it also killed the dash lights and nothing happened when I hit the starter
    Sounds like someone rewired the bike. Removing the R/R should not remove the battery from the circuit. The battery and R/R are in parallel to supply power to the electical system through the ignition switch.
    Read about Charging Quick Test GS Charging Health GS Stator

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  5. #95
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    Quick question, somewhat related. Is it normal for those r/r connectors to get hot whilst running? I attempted to do the quick test. Noticed the bolt on the battery negative terminal was a bit loose, which has happened before, probably due to vibration. I snugged it up and proceeded to take a few readings. Didn't get very far, as the battery is likely toast. After overnight charging on the tender, it showed 13.2v with key off, when I checked the terminals and noticed the loose negative bolt. Left it with the key on for about 40 secs (headlight on), then fired up the bike, fiddling with the idle speed for a few seconds to get it to idle. Whilst getting the meter probes into position on the battery, the r/r wire connectors happened to be in contact with my wrist, and I noticed them steadily getting hotter. I immediately shut off the bike....left it with the key and headlight on for about 20 more seconds while inspecting the wires. Bike won't crank now, shows 12.2 volt. Going to buy a new battery and then test. How warm do those bullet connectors normally get whilst running?

    Edit: It is a later model r/r, fitted about 10 years ago. From a cbr, IIRC.
    Last edited by Mysuzyq; 07-03-2020 at 03:42 PM.
    '82 GS1100E



    Quote Originally Posted by themess View Post
    Only in your own mind did you refute what I wrote.

  6. #96
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    Quote Originally Posted by Mysuzyq View Post
    Quick question, somewhat related. Is it normal for those r/r connectors to get hot whilst running? I attempted to do the quick test. Noticed the bolt on the battery negative terminal was a bit loose, which has happened before, probably due to vibration. I snugged it up and proceeded to take a few readings. Didn't get very far, as the battery is likely toast. After overnight charging on the tender, it showed 13.2v with key off, when I checked the terminals and noticed the loose negative bolt. Left it with the key on for about 40 secs (headlight on), then fired up the bike, fiddling with the idle speed for a few seconds to get it to idle. Whilst getting the meter probes into position on the battery, the r/r wire connectors happened to be in contact with my wrist, and I noticed them steadily getting hotter. I immediately shut off the bike....left it with the key and headlight on for about 20 more seconds while inspecting the wires. Bike won't crank now, shows 12.2 volt. Going to buy a new battery and then test. How warm do those bullet connectors normally get whilst running?
    Hot means poor connection. There is no exception, regardless if it is something loose, dirty, corroded, or otherwise compromised.

    The simple reason is that a larger resistance will dissipate more heat. So unless you are talking about much larger wires or connections (that can dissipate much more heat without getting as hot).
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  7. #97
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    Thanks for the quick reply. Are you saying they should ideally run cool to the touch, when properly connected? Would testing with a shot battery cause them to heat up more than usual? Sorry if these questions are stupid; I'm quite a duffer when it comes to electrical problems.
    '82 GS1100E



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    Only in your own mind did you refute what I wrote.

  8. #98
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    When you put a current path (e.g. a wire connecting a load) to the battery, current flows through that current path (cp). The current though the CP is the same no matter where you measure the current (think of water running through a hose where hose is cp and water is current). I'm describing a single current path with no splits or parallel paths.

    Because the current actually goes in a full circuit (through battery, through cp and back through battery ...etc round and round), the amount of current flowing is determined by the total resistance in the battery plus cp. If that resistance is distributed evenly (ignoring battery connections) then the (cp) wire heats uniformly. However, if the resistance is concentrated at "connections", then those dissipate the heat in proportion to their total resistance.

    If the bike's motor makes the wires warm, then the wires wont be cool. You just do not want a situation where the contacts are much (more than 10-20 degF) warmer than the rest of the wire.

    If the battery is dead (low State of Charge), then there will be less current and correspondingly less heat all around independent of how the resistance is distributed, but still distributed in proportion to those resistances.
    Last edited by posplayr; 07-03-2020 at 04:25 PM.
    Read about Charging Quick Test GS Charging Health GS Stator

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  9. #99
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    Thanks very much Posplayr, appreciate the simple explanation! I've never really had any electrical or even mechanical issues with this bike. Upgraded the stock r/r proactively, and have only replaced the battery every few years. It's very possible the connections now need attention. Thanks again!
    '82 GS1100E



    Quote Originally Posted by themess View Post
    Only in your own mind did you refute what I wrote.

  10. #100
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    Quote Originally Posted by Mysuzyq View Post
    Thanks very much Posplayr, appreciate the simple explanation! I've never really had any electrical or even mechanical issues with this bike. Upgraded the stock r/r proactively, and have only replaced the battery every few years. It's very possible the connections now need attention. Thanks again!
    Ohms law is V=IR

    Relating that to the pictured analogy, the voltage push (or pressure) required to overcome a given ohm resistance is in proportion to the amount of current in amp (flow) you want.

    For a given R ohms, Current increases with voltage.

    All of these forms are the same law; if you know the value any two, you can solve for the third.

    V=I*R
    I=V/R
    R=V/I



    In the case of your low battery

    I=V/R (assume R is constant)
    A lower V gives a lower I.

    What does that have to do with heat? heat is the accumulation of energy converted to heat. Like if you burn a wooden stick, the energy in the stick turns to heat, current pushed through R gives off heat in a similar way. In fact this is considered an ideal conversion of energy to heat.

    Electrical power is given by P = I*V (in words the voltage times the current is electrical power). Substitution for i or V we get two different forms

    P = IV=I^2*R = V^2/R

    In P=I^2*R we see power is proportional to resistance R for any given I^2.
    Last edited by posplayr; 07-03-2020 at 05:52 PM.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


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